输入65 68时，输出的答案是否可能有两种：55571.632449349847

55571.632449349854

#include <iostream>
#include <cmath>
using namespace std;
typedef long double ld;
int main()
{
    int n = 65, m = 68;
    int r = n + m;

    // 输出 r 的值
    cout << "r: " << r << endl;

    // 计算并输出结果
    ld s1 = r * r * M_PI;
    ld s2 = r * M_PI * r;

    printf("%.10Lf\n", s1);
    printf("%.10Lf\n", s2);

    return 0;
}